[VIRT-327 # Richard's upstream QEMU work ]

Review Mark's target/ppc getVSR patch set.

Two rounds of "tcg vector improvments"; hopefully that's ready to go in on Monday.

More work on "bit select" and "compare select" primitives. I can now vectorize Neon VSHL/VSHR variable shift (where positive values are left shift and negative values are right shift). Waiting on posting this while previous tcg vector patch set is still in flight.

Review Alex's demacrofy v5. Wrote a boot.S for Alpha.

Review David's latest target/s390 vector patch set.

Review Sato-san's target/rx v8. Played around with a few disassembler improvements, but I'll not confuse the review process by posting them now.

r~